Mobile learning already is taking place all the time. It could be someone taking an online meditation course, learning a new language on the bus or finding the answer to a question being debated. Mobile learning takes place in more than just a “Formal Education Environment” it takes place in small doses throughout many people commutes, r&r time and social settings.
I find mobile learning extremely helpful in many of my music classes especially when students do self-directed projects like learning new songs or researching new techniques. With the increasing cost of keeping technology up to date, mobile learning is a great way to get over the lack of $$$ hurdle and embark in the new direction you wish to move with your teaching.